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5224f79096
There is a regular need in the kernel to provide a way to declare
having a dynamically sized set of trailing elements in a structure.
Kernel code should always use “flexible array members”[1] for these
cases. The older style of one-element or zero-length arrays should
no longer be used[2].
This code was transformed with the help of Coccinelle:
(next-20220214$ spatch --jobs $(getconf _NPROCESSORS_ONLN) --sp-file script.cocci --include-headers --dir . > output.patch)
@@
identifier S, member, array;
type T1, T2;
@@
struct S {
...
T1 member;
T2 array[
- 0
];
};
UAPI and wireless changes were intentionally excluded from this patch
and will be sent out separately.
[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
Link: https://github.com/KSPP/linux/issues/78
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
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#ifndef FDT_H
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#define FDT_H
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/*
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* libfdt - Flat Device Tree manipulation
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* Copyright (C) 2006 David Gibson, IBM Corporation.
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* Copyright 2012 Kim Phillips, Freescale Semiconductor.
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*/
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#ifndef __ASSEMBLY__
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struct fdt_header {
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fdt32_t magic; /* magic word FDT_MAGIC */
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fdt32_t totalsize; /* total size of DT block */
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fdt32_t off_dt_struct; /* offset to structure */
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fdt32_t off_dt_strings; /* offset to strings */
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fdt32_t off_mem_rsvmap; /* offset to memory reserve map */
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fdt32_t version; /* format version */
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fdt32_t last_comp_version; /* last compatible version */
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/* version 2 fields below */
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fdt32_t boot_cpuid_phys; /* Which physical CPU id we're
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booting on */
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/* version 3 fields below */
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fdt32_t size_dt_strings; /* size of the strings block */
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/* version 17 fields below */
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fdt32_t size_dt_struct; /* size of the structure block */
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};
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struct fdt_reserve_entry {
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fdt64_t address;
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fdt64_t size;
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};
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struct fdt_node_header {
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fdt32_t tag;
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char name[];
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};
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struct fdt_property {
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fdt32_t tag;
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fdt32_t len;
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fdt32_t nameoff;
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char data[];
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};
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#endif /* !__ASSEMBLY */
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#define FDT_MAGIC 0xd00dfeed /* 4: version, 4: total size */
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#define FDT_TAGSIZE sizeof(fdt32_t)
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#define FDT_BEGIN_NODE 0x1 /* Start node: full name */
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#define FDT_END_NODE 0x2 /* End node */
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#define FDT_PROP 0x3 /* Property: name off,
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size, content */
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#define FDT_NOP 0x4 /* nop */
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#define FDT_END 0x9
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#define FDT_V1_SIZE (7*sizeof(fdt32_t))
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#define FDT_V2_SIZE (FDT_V1_SIZE + sizeof(fdt32_t))
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#define FDT_V3_SIZE (FDT_V2_SIZE + sizeof(fdt32_t))
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#define FDT_V16_SIZE FDT_V3_SIZE
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#define FDT_V17_SIZE (FDT_V16_SIZE + sizeof(fdt32_t))
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#endif /* FDT_H */
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